APA-viite (7. p.)

Carrad, B., Papua New Guinea. Dept. of Primary Industry, & Bourke, R. M. (1985). Farming systems research in Papua New Guinea. Dept. of Primary Industry.

Chicago-viite (17. p.)

Carrad, Bruce, Papua New Guinea. Dept. of Primary Industry, ja R. Michael Bourke. Farming Systems Research in Papua New Guinea. Konedobu: Dept. of Primary Industry, 1985.

MLA-viite (9. p.)

Carrad, Bruce, et al. Farming Systems Research in Papua New Guinea. Dept. of Primary Industry, 1985.